Plášilite, Na(UO2)(SO4)(OH).2H2O, a new uranyl sulfate mineral from the Blue Lizard mine, San Juan County, Utah, USA

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F15%3A%230002605" target="_blank" >RIV/00023272:_____/15:#0002605 - isvavai.cz</a>

Result on the web

<a href="http://www.jgeosci.org/content/jgeosci.184_kampf.pdf" target="_blank" >http://www.jgeosci.org/content/jgeosci.184_kampf.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.184" target="_blank" >10.3190/jgeosci.184</a>

Result language

angličtina

Original language name

Plášilite, Na(UO2)(SO4)(OH).2H2O, a new uranyl sulfate mineral from the Blue Lizard mine, San Juan County, Utah, USA

Original language description

lasilite (IMA 2014-021), Na(UO2)(SO4)(OH). 2H2O, is a new uranyl sulfate mineral from the Blue Lizard mine, San Juan County, Utah, USA. The new mineral occurs in and on sandstone matrix in close association with atacamite, blodite, brochantite, calcite, chalcanthite, dickite, gerhardtite, gypsum, hexahydrite, johannite, manganoblodite, natrozippeite and tamarugite. It is a low-temperature, secondary mineral formed by the post-mining weathering of uraninite. Plasilite is monoclinic, with the space group P2(1)/c, and unit cell parameters a = 8.7122(6), b = 13.8368(4), c = 7.0465(2) angstrom, beta = 112.126(8)degrees, V = 786.89(7) angstrom3 and Z = 4. Crystals are long, thin blades, elongated on [001] and flattened on {100}; rarely occur as prisms, also elongated on [001]. Crystals exhibit the forms {100}, {010} and {011}, and are commonly twinned on {100}. Plasilite is greenish yellow, has a white streak and fluoresces bluish white under both long-wave and short-wave UV. It is transparent with vitreous luster. The mineral has a Mohs hardness probably between 2 and 3, brittle tenacity, even fracture and two perfect cleavages, {010} and {001}. The calculated density based on the empirical formula is 3.726 g/cm3. The mineral is optically biaxial (+), with alpha = 1.556(1), beta = 1.581(1) and gamma = 1.608(1) (measured with white light). The measured 2V is 88(1) degrees and the calculated 2V is 89 degrees. Dispersion is moderate, r < v. The mineral is pleochroic with X = nearly colourless, Y = very pale yellow, Z = pale yellow; X < Y < Z. The optical orientation is X = b, Y <^> c = 4 degrees in obtuse beta. The empirical formula of plasilite is Na-0.94(UO2)(S1.01O4)(OH)(H2O)2 (based on 9 O apfu). Prominent features in the Raman spectrum include the symmetric stretching vibrations of the uranyl (UO22+) group and sulfate tetrahedra and the O-H stretching and bending vibrations of the H2O molecules.

Czech name

—

Czech description

—

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DB - Geology and mineralogy

OECD FORD branch

—

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Geosciences

ISSN

1802-6222

e-ISSN

—

Volume of the periodical

60

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

10

Pages from-to

1-10

UT code for WoS article

000348358700001

EID of the result in the Scopus database

—